Tree uprooting attachment for bulldozers



Dec. 29, 1953 w. A. WINGET TREE UPROOTING ATTACHMENT FOR BULLDOZERS ,Filed Jan. 15, 1951 2 Sheets-Sheet 1 William A. Winger INVENTOR.

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TREE UPROOTING ATTACHMENT FOR BULLDOZERS Filed Jan. 15, 1951 2 Sheets-Sheet 2 1 William A. Winger INVENTOR.

BY w wyvm Patented Dec. 29, 1953 TREE UPROOTING ATTACHMENT FOR BULLDOZERS WilliamA. Winget,Lima, Ohio Application January 15, 1951,'Serial'No;'205,971

3 Claims.

This invention relates to improvements in attachments for bulldozers and particularly to a device for use in clearing fields.

An object of this invention is to provide-an attachment for a bulldozer which is arranged to employ certain standard controls of the bulldozer and which has a cutter for both vertical and horizontal roots of a tree and whichis providedwith a mechanism to shake and/ or displace the tree by holding the trunk and then moving the jaws which have clamping contact with the tree trunk.

Ancillary objects and features of importance will become apparent in following the description of the illustrated form of the invention.

In the drawings:

Figure 1 is a plan view of astandard bulldozer having the attachment applied thereto;

Figure 2 is an elevational viewof the device shown in Figure 1;

Figure 3 is an enlarged sectional view taken substantially on the line 3-3 of Figure 1, portions of the jaw and clamp assembly being omitted; and

Figure 4 is a sectional view taken substantially on the line l-A of Figure 2 and in the direction of the arrows.

The instant attachment It) for the standard bulldozer I4 is arranged to be attached to the frame It thereof by means of a box clamp it which is bolted or otherwise fastened in place. Accordingly, the attachment may be raised and lowered in accordance with the lifting and lowering movement of the frame It through the action of the fluid motors 2E) and 22.

A cutter assembly 24 is operatively connected with the clamp l8 and includes a vertical cutter 30 with a rearwardly sloping cutting edge 32, and the vertical cutter 30 is welded to the support 34. This support (Figure 3) is welded to a rear plate 36 having the back part of a telescopic boom 33 fixed, as by welding, thereto. Brackets w on each side of the support 3-; are fixed to the bottom part of the clamp l8 and are held in place by standard means, as welding. A support 42 has the telescopic boom 38 fixed to it and the lower end of the support is welded to the top part of the cutter above the frontal recess Mttherem which is employed for the purpose of rolling logs. Bracing i6 is used to help hold the support 42, and other bracing may be used wherever 1t is found expedient or necessary.

Rearwardly diverging horizontal or substantially horizontal cutters '38 and 50 are fixed to the lower end of the blade 36 and are provided with of. The vertical cutter 33 is adapted to sever horizontal roots of a tree (Figure 2) while the horizontal cutters are adapted to sever vertical roots. Rootswhich are not truly vertical or horizontal lare severed by either or both of the cutter assem- The boom 38 includes an inner sleeve 58 which is preferably square in cross-section and an outer sleeve 8B of considerably larger diameter so that the rollers 52 may hold the sleeves spaced from each other for facility of sliding movement of the sleeves with respect to each other. The rollers 62 may be carried by either of the sleeves; however, they are illustrated as being attached to the outer sleeve Ed.

One end of the sleeve 58 is closed by the plate 68 while the other 'end'is open. The plate accommodates the cylinder 18 of a hydraulic motor or ram of the double acting type, and the piston rod 12 thereof is attached by means of the pivot pin [13 to the bracket 74 which is mounted on the closure plate 75 of the sleeve 6t. Accordingly, through the action of the hydraulic motor the sleeves may be extended or retracted with respect I to each other.

rigidly fixed to the sleeve 69 and includes a cylinder 18 which is provided with a piston 8t having the piston rod 82 extending from the cylinder. Hoses 83 and 84 are used to feed the motor 16, while the hoses 85 and 36 are operatively connected with the cylinder H1. The hoses 83 and 84 are passed through the bore of the sleeve 58 and held in place by means of a clamp 88 and then extend through suitable apertures in the sleeve 6!] for communication with ports in the cylinder 18. An ample supply of hose is provided to allow the telescopic boom to be extended and retracted.

The function of the motor 76 is to operate the jaws 90 and 9| which are connected to the piston rod 82 at their inner ends by means of the links deflector hooks 52 and 5d at the outer ends theref om sliding off the ends of the clamp bar.

In operation the bulldozer I4 is moved to a position near a tree. The frame I6 is lowered and the bulldozer moved forward. By this action the cutters 3E 53 and 50 will sever the roots of the tree. However, prior to the severing operation, fluid under pressure i delivered by standard controls from the bulldozer and from a standard supply and source of the bulldozer into the cylinder 79 causing the sleeve 80 of the boom 38 to be extended. When the clamp bar 96 contacts the tree, the jaws 99 and 9! may be operated by applying fluid under pressure to the motor ?6. The fluid in the cylinderflfl maybe released by the bulldozer controls artertne jaws 9d and 9| grasp the tree whereby the boom 38 motor connected to said jaws to maintain their said sleeves in a definite spaced relationship.

is held. extended mainly by friction anaeewnaarily by the action of the jawsdiland-9,l .,,clamp,- ing on the tree. As the bulldozer"movesforward so that the cutter assembly 24 severs at least some of the tree roots, the boom is allowed to retract, but the jaws 90 and 9! prevent the tree from ever toppling over in any direction dccordingly, the tree may beheld while the roots are being severed and after the roots are sev ered.

To remove a tree WithOlllf/llsillg the cutters, it is necessary only to lift the'boo'm 38and grasp it with the jaws 89 and 9!. Then by applying fluid under pressure into the cylinder '10, the tree trunk may be moved forwardly and rearwardly to pull up the tree.

Having described the invention, what is claimed as new is:

1. In combination with the pivotal frame of a bulldozer, an attachment comprising a clamp connected to the frame, a longitudinally extensible boom with means fastening said boom to said clamp, telescopic means rigidly secured to said clamp for extending and retracting said boom, a jaw assembly including a fixed cross bar and a pair of jaws carried by said boom, a fluid 3. A bulldozer attachment comprising a clamp adapted to'befastened to a part of a bulldozer,

'a root cutter secured to the clamp, an extensible boom.fastened to the clamp and including forward and rearmembers, a clamp bar fixed to the forward member, a pair of jaw members pivotallyrsecured to the ends of the clamp bar, a fluid motor carried by the boom and connecting the forward and rear members for extending the boom, and a second fiuid motor carried by the boom in parallel with the first fluid motor and connected to said jaw members for maintaining their gripping hold on a tree whose roots are severed by said cutter, said root cutter and said jaw members acting in unison to remove the treegripped by said jaw members.

WILLIAM A. VVINGE-T.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,919,075 Rasmussen July 13, 1933 2,295,459 Edwards Sept. 8, 1942 2,414,994 Wright Jan. 28, 194? 2,595,923 Taylor et al. May 2, 1950 2,508,284 Oliver May 16, 1950 2,535,099 slick Dec. 6, 1950 

